Kacper vs Liam

Baby Name Comparison — 2026

Kacper

Boy #5,668 Most Popular 2 Syllables

Meaning

"treasurer, keeper of treasure"

Origin: Persian Gathaspar

Cultural Roots

Polish Czech Slovak Central European

Quick Stats

Popularity Rank
#5,668
Total SSA Count
17
Syllables
2
Formality
Formal
Nicknames
Kac, Kaś

Playground Safety Score

✓ All Clear
Full profile for Kacper →

Liam

Boy #1 Most Popular 2 Syllables

Meaning

"strong-willed warrior"

Origin: Irish

Cultural Roots

Irish English American

Quick Stats

Popularity Rank
#1
Total SSA Count
22,164
Syllables
2
Formality
Moderate
Nicknames
Lee

Playground Safety Score

✓ All Clear
Full profile for Liam →

Popularity Comparison

Kacper Rank #5,668
Liam Rank #1

Liam is more popular, ranked #1 vs #5668 for Kacper.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kacper ___

  • Kacper Jan
  • Kacper Marek
  • Kacper Soren
  • Kacper Cole
  • Kacper Finn
  • Kacper Aleksy

Liam ___

  • Liam James
  • Liam Alexander
  • Liam Thomas
  • Liam Michael
  • Liam Patrick
  • Liam Joseph

Sibling Name Ideas

Names that pair well as siblings.

If you choose Kacper

Zosia Maja Marek Aleksy Hania

If you choose Liam

Olivia Emma Noah Charlotte Sophia

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Kacper or Liam more popular?

Liam is more popular, ranked #1 compared to Kacper at #5668 in the United States.

What do Kacper and Liam mean?

Kacper means "treasurer, keeper of treasure" (Persian Gathaspar origin). Liam means "strong-willed warrior" (Irish origin).

Are Kacper and Liam boy or girl names?

Kacper is primarily a boy name. Liam is primarily a boy name.

More Comparisons

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← Full profile: Kacper ← Full profile: Liam Browse all baby names